[Zope-dev] Order of Form Keys in REQUEST

2004-03-10 Thread Sandra Chong
Hi,

How does Zope's REQUEST object decide what order to store the form keys?
I've got a form with fields in order a, b, c, d - but in REQUEST.form,
they're stored out of order.

This is causing quite a big problem, as I'd like to dynamically output the
form values in order after the form has been submitted.

Any thoughts?

Many thanks in advance. :)
Sandra.


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Re: [Zope-dev] Order of Form Keys in REQUEST

2004-03-10 Thread Max M
Sandra Chong wrote:

 How does Zope's REQUEST object decide what order to store the form keys?
 I've got a form with fields in order a, b, c, d - but in REQUEST.form,
 they're stored out of order.

 This is causing quite a big problem, as I'd like to dynamically 
output the
 form values in order after the form has been submitted.

Dictionary keys are unordered.

You need to store the order of the keys somewhere else. Ie. to have a 
list in your form with the keys in order, Or to name them alphabetically 
and then sort the keys.

regards Max M

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Re: [Zope-dev] Question about _v_ attributes and database connections

2004-03-10 Thread Chris Withers
Marco Bizzarri wrote:

 What I would like to do is to have an hook to the removal of a _v_
 attribute, so that I can perform some action *BEFORE* losing any
 reference to the object itself. I look at the setattr code in
 cPersistence.c and tried also to write my own __setattr__,
__setattr__ isn't the hook you're looking for..

This is better done in a transcation-hooking type way, a la CTM.py in ZOracleDA...

cheers,

Chris

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[Zope-dev] Sessions and Zope Transactions in standard_error_message

2004-03-10 Thread Chris Withers
michael wrote:

My *guess* is that this error happens when a ZODB conflict error is 
thrown from Transience while rendering standard_error_message.
Oh, riiight.

Hmmm, is Zope's handling of transactions in standard_error_message still as 
fubar'ed as it was?

cheers,

Chris

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[Zope-dev] About Local File System 1-1-0

2004-03-10 Thread Juan Javier Carrera Obrero
Hi again,

Thank you for your answer about Specify a domain and leave the password for
a user blank.

I have other similar question. I am using Local File System 1-1-0, but this
version does not allow to view the content when you reference the Local File
System in the URL, or when you click on View.

Why it can occur?

Thanks !


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Re: [Zope-dev] Order of Form Keys in REQUEST

2004-03-10 Thread Chris Withers
Max M wrote:

Dictionary keys are unordered.

You need to store the order of the keys somewhere else. Ie. to have a 
list in your form with the keys in order, Or to name them alphabetically 
and then sort the keys.
...or just do something like:

keys = REQUEST.form.keys()
keys.sort()
for key in keys:
  print key
  print REQUEST.form[key]
return printed

cheers,

Chris

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[Zope-dev] Re: OFS.ObjectManager raising string exceptions?

2004-03-10 Thread Tres Seaver
Stuart Bishop wrote:

In 2.7, ObjectManager raises 'Bad Request' most of the time, but in one
case actually raises zExceptions.BadRequest. Did this get missed
when all the string exceptions were getting replaced, or is it
deliberately like this for backwards compatibility?
I must've missed it.  Please feel free to check in any patch which 
removes string exceptions, on both the HEAD and the 2.7 branch.

Tres.
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Re: [Zope-dev] Product Access to Files

2004-03-10 Thread Ian Beatty
On 2004-03-10 10:14 AM, Chris Withers is reputed to have said:

 Ian Beatty wrote:
 
 I've been messing around with DTMLFile and ClassicHTMLFile and the like,
 haven't been able to figure out how to get it to work for arbitrary paths.
 They also require all my file names end in '.dtml', which is quite a pain.
 
 Any suggestions?
 
 Local FS?
 What Sandor said?
 Apache and rewrite rules?

I'm overriding '__getitem__' and using Python's os package to directly
access the local file system. I just sniff the file name extension and set
the response content-type, then return the contents of the named file.
Simple and stupid.

I actually delegate the file-serving to a helper class, and use recursion to
handle arbitrary-length paths for arbitrary-depth file system hierarchies.

Simple, stupid, and inelegant, but it seems to work.

FileSystemSite seemed geared towards providing ZMI access to static files. I
just want my product to be able to dish out preset files that are part of
the product.

(If anyone's curious, I'm using a Zope product for a back-end to a
Mozilla/XUL front-end. This static file stuff allows the product to provide
the XUL, JavaScript, and CSS files needed to define the Mozilla-based
interface.)

Thanks for all the suggestions.

Cheers,

..Ian

-- --- -- --- -- --- -- --- -- --- -- --- -- --- -- --- -- --- --
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Physics Education Research Group  voice: 413.545.9483
Department of Physics   fax: 413.545.4884
Univ. of Massachusetts  AIM: (available upon request)
Amherst, MA 01003-4525 USA   http://umperg.physics.umass.edu/
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Re: [Zope-dev] About Local File System 1-1-0

2004-03-10 Thread Andreas Heckel
If you are on Zope 2.7 make sure you have installed LocalFS-1.1-andreas
Get it from http://www.easyleading.org/
Greetings Andreas

Juan Javier Carrera Obrero wrote:
Hi again,

Thank you for your answer about Specify a domain and leave the password for
a user blank.
I have other similar question. I am using Local File System 1-1-0, but this
version does not allow to view the content when you reference the Local File
System in the URL, or when you click on View.
Why it can occur?

Thanks !


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[Zope-dev] test.py

2004-03-10 Thread Evan Simpson
Jeremy Hylton wrote:
Make sure App.Product is imported first, so that test.py can work.

This change does not affect the old utilities/testrunner.py.
This checkin message caused me to notice 'test.py' for the first time. 
Can you point me to any discussion/docs on it?  When did/will it replace 
testrunner?  Shouldn't the python2.2 in the #! line be python2.3?

Sorry for the flood of questions, but this and the recent doctest-style 
tests being checked in have made me wonder if I've been missing a 
significant shift in testing tech.

Cheers,

Evan @ 4-am

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[Zope-dev] Re: test.py

2004-03-10 Thread Jeremy Hylton
On Wed, 2004-03-10 at 13:39, Evan Simpson wrote:
 Jeremy Hylton wrote:
  Make sure App.Product is imported first, so that test.py can work.
  
  This change does not affect the old utilities/testrunner.py.
 
 This checkin message caused me to notice 'test.py' for the first time. 
 Can you point me to any discussion/docs on it?  When did/will it replace 
 testrunner?  Shouldn't the python2.2 in the #! line be python2.3?

There is minimal documentation in the test.py docstring.  All the
command line arguments are described.  It's basic strategy for finding
tests isn't documented, but I don't think it's too different from
testrunner.py.

test.py obsoleted testrunner.py as of Zope 2.7.  test.py was being used
by ZODB3 and Zope3 for a while before it was added to Zope 2.7.

I'm not sure which #! line you mean, but I think you're right to say it
should be python 2.3.  All the software on the head requires python 2.3.

 Sorry for the flood of questions, but this and the recent doctest-style 
 tests being checked in have made me wonder if I've been missing a 
 significant shift in testing tech.

test.py has all sorts of bells and whistle for running tests.  It's a
lot more flexible than testrunner.py.

Jeremy



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[Zope-dev] Re: test.py

2004-03-10 Thread yuppie
Hi!

Jeremy Hylton wrote:
test.py obsoleted testrunner.py as of Zope 2.7.  test.py was being used
by ZODB3 and Zope3 for a while before it was added to Zope 2.7.
Why does setup.py still install testrunner.py, not test.py?

And BTW: Could *all* files necessary to run tests be installed?

I'm not sure which #! line you mean, but I think you're right to say it
should be python 2.3.  All the software on the head requires python 2.3.
Some grep results from Zope HEAD:

setup.py: #! /usr/bin/env python
test.py:  #! /usr/bin/env python2.2
utilities\check_catalog.py:   #!/usr/bin/env python2.1
utilities\requestprofiler.py: #!/usr/bin/env python
utilities\compilezpy.py:  #!/usr/bin/env python
utilities\zpasswd.py: #!/usr/bin/env python
utilities\testrunner.py:  #! /usr/bin/env python2.2
utilities\ZODBTools\space.py: #! /usr/bin/env python
And many tests, some of them still with python1.5, e.g.

lib\python\TAL\tests\run.py:  #! /usr/bin/env python1.5

Could we have a policy for this? I guess '#! /usr/bin/env python' is 
easier to keep up to date ...

Cheers,
Yuppie


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Re: [ZODB-Dev] Re: BTrees strangeness (was [Zope-dev] Zope 2.X BIG Session problems - blocker - our site dies - need help of experience Zope developer, please)

2004-03-10 Thread Dieter Maurer
michael wrote at 2004-3-10 15:22 +1300:
 ...
I have been trying on and off to recreate this error via brute force 
loading of the simplest possible site that uses sessions. I failed to 
see this particular KeyError *until* I tried reading a session variable 
from standard_error_message. Now I can recreate these quite frequently.

This is a well known problem in Zope, lengthy discussed
but apparently still not yet fixed...

  The problem is that error handling starts after the main
  transaction has been aborted. Aborting or committing
  a transaction implicitely starts a new transaction.

  If error handling causes objects to be registered 
  in the transaction (because it writes some objects
  and this can happen for session variables even when they
  are only read), this transaction is tainted.
  As the transaction is not aborted after error handling,
  the transaction and the modified cache are spilled
  (independently!) into a later request.

  As the connection/cache may later end up in a different thread,
  objects can be invalidated asynchronously. This is disastrous.

  Zope *MUST* abort (or commit) the transaction after error handling!!!

-- 
Dieter

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Re: [ZODB-Dev] Re: BTrees strangeness (was [Zope-dev] Zope 2.X BIG Session problems - blocker - our site dies - need help of experience Zope developer, please)

2004-03-10 Thread Chris McDonough
On Wed, 2004-03-10 at 15:20, Dieter Maurer wrote:
 michael wrote at 2004-3-10 15:22 +1300:
  ...
 I have been trying on and off to recreate this error via brute force 
 loading of the simplest possible site that uses sessions. I failed to 
 see this particular KeyError *until* I tried reading a session variable 
 from standard_error_message. Now I can recreate these quite frequently.
 
 This is a well known problem in Zope, lengthy discussed
 but apparently still not yet fixed...
 
   The problem is that error handling starts after the main
   transaction has been aborted. Aborting or committing
   a transaction implicitely starts a new transaction.
 
   If error handling causes objects to be registered 
   in the transaction (because it writes some objects
   and this can happen for session variables even when they
   are only read), this transaction is tainted.
   As the transaction is not aborted after error handling,
   the transaction and the modified cache are spilled
   (independently!) into a later request.
 
   As the connection/cache may later end up in a different thread,
   objects can be invalidated asynchronously. This is disastrous.
 
   Zope *MUST* abort (or commit) the transaction after error handling!!!

I think the transaction in which the error code operates in should be
aborted.  There is no other sane thing to do.  I think this might be as
easy as adding a few strategic get_transaction().abort() calls to
various cases in Zope/App/startup.py's zpublisher_exception_hook.  I
don't have the time to untangle that mess at the moment, but I will
enter a collector issue in.

- C



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Re: [ZODB-Dev] Re: BTrees strangeness (was [Zope-dev] Zope 2.X BIG Session problems - blocker - our site dies - need help of experience Zope developer, please)

2004-03-10 Thread Chris McDonough
Nevermind.  http://zope.org/Collectors/Zope/789 and
http://zope.org/Collectors/Zope/786

The bug neglector is really living up to its name lately (not pointing
fingers, mea culpa).

- C



On Wed, 2004-03-10 at 15:20, Dieter Maurer wrote:
 michael wrote at 2004-3-10 15:22 +1300:
  ...
 I have been trying on and off to recreate this error via brute force 
 loading of the simplest possible site that uses sessions. I failed to 
 see this particular KeyError *until* I tried reading a session variable 
 from standard_error_message. Now I can recreate these quite frequently.
 
 This is a well known problem in Zope, lengthy discussed
 but apparently still not yet fixed...
 
   The problem is that error handling starts after the main
   transaction has been aborted. Aborting or committing
   a transaction implicitely starts a new transaction.
 
   If error handling causes objects to be registered 
   in the transaction (because it writes some objects
   and this can happen for session variables even when they
   are only read), this transaction is tainted.
   As the transaction is not aborted after error handling,
   the transaction and the modified cache are spilled
   (independently!) into a later request.
 
   As the connection/cache may later end up in a different thread,
   objects can be invalidated asynchronously. This is disastrous.
 
   Zope *MUST* abort (or commit) the transaction after error handling!!!


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[Zope-dev] Re: [ZODB-Dev] Re: BTrees strangeness (was Zope 2.X BIG Session problems - blocker - our site dies - need help of experience Zope developer, please)

2004-03-10 Thread Casey Duncan
On Wed, 10 Mar 2004 17:50:41 -0500
Chris McDonough [EMAIL PROTECTED] wrote:

 Nevermind.  http://zope.org/Collectors/Zope/789 and
 http://zope.org/Collectors/Zope/786
 
 The bug neglector is really living up to its name lately (not pointing
 fingers, mea culpa).

'Bout time fer a bug day I reckon... ;^)

-Casey


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RE: [Zope-dev] Order of Form Keys in REQUEST

2004-03-10 Thread Sandra Chong
Thank you so much. :D You guys are legends. I will try keeping a separate
ordered list and save it in the session for the form handler to refer to.
Many thanks again. :)

Sandra.

 -Original Message-
 From: Chris Withers [mailto:[EMAIL PROTECTED]
 Sent: Wednesday, 10 March 2004 11:19 PM
 To: Max M
 Cc: Sandra Chong; [EMAIL PROTECTED]
 Subject: Re: [Zope-dev] Order of Form Keys in REQUEST


 Max M wrote:

  Dictionary keys are unordered.
 
  You need to store the order of the keys somewhere else. Ie. to have a
  list in your form with the keys in order, Or to name them
 alphabetically
  and then sort the keys.

 ...or just do something like:

 keys = REQUEST.form.keys()
 keys.sort()
 for key in keys:
print key
print REQUEST.form[key]

 return printed

 cheers,

 Chris

 --
 Simplistix - Content Management, Zope  Python Consulting
 - http://www.simplistix.co.uk




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Re: [Zope-dev] Re: [ZODB-Dev] Re: BTrees strangeness (was Zope 2.X BIG Session problems - blocker - our site dies - need help of experience Zope developer, please)

2004-03-10 Thread Paul Winkler
On Wed, Mar 10, 2004 at 06:14:30PM -0500, Casey Duncan wrote:
 On Wed, 10 Mar 2004 17:50:41 -0500
 Chris McDonough [EMAIL PROTECTED] wrote:
 
  Nevermind.  http://zope.org/Collectors/Zope/789 and
  http://zope.org/Collectors/Zope/786
  
  The bug neglector is really living up to its name lately (not pointing
  fingers, mea culpa).
 
 'Bout time fer a bug day I reckon... ;^)

I suggested doing a bug day as part of the pycon z2 sprint,
but we haven't really discussed the various sprint proposals
in depth yet.

-- 

Paul Winkler
http://www.slinkp.com
Look! Up in the sky! It's FORNICATOR BOY!
(random hero from isometric.spaceninja.com)

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Re: [Zope-dev] Order of Form Keys in REQUEST

2004-03-10 Thread Max M
Sandra Chong wrote:
Thank you so much. :D You guys are legends. I will try keeping a separate
ordered list and save it in the session for the form handler to refer to.
Many thanks again. :)


It is easier to save it in a hidden field in the form:

input type=hidden name=sorted_keys value=key1,key1,key3,key4

And then you can get it like (PythonScript):

sorted_keys = REQUEST['sorted_keys'].split(',')

But as far as I remember, a form keps the order of items in it, per the 
spec. So you could probably do:

tal:block tal:repeat=key sorted_keys
input type=hidden name=sorted_keys:list
   tal:attributes=key
/tal:block
Which you can get like (PythonScript):

sorted_keys = REQUEST['sorted_keys']

And I am pretty shure that they are in order. But I could be wrong, so 
the first approach is probably the safest.

Btw. These questions should really be asked on the Zope list, not 
zope-dev. zope-dev is for subjects regarding the development of zope, 
while the zope list is for development with Zope.

regards Max M

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RE: [Zope-dev] Order of Form Keys in REQUEST

2004-03-10 Thread Sandra Chong
Oops, sorry about that. It's hard to tell just by the descriptions on
Zope.org which is the best list for what.

Thanks for the other tip. :) I'll probably stick with holding a server-side
array with the info, though, as I might decide later to dynamically generate
the forms (there are a few) using the data held in there.

 -Original Message-
 From: Max M [mailto:[EMAIL PROTECTED]
 Sent: Thursday, 11 March 2004 9:05 AM
 To: Sandra Chong
 Cc: [EMAIL PROTECTED]
 Subject: Re: [Zope-dev] Order of Form Keys in REQUEST


 Sandra Chong wrote:
  Thank you so much. :D You guys are legends. I will try keeping
 a separate
  ordered list and save it in the session for the form handler to
 refer to.
  Many thanks again. :)


 It is easier to save it in a hidden field in the form:

  input type=hidden name=sorted_keys value=key1,key1,key3,key4

 And then you can get it like (PythonScript):

  sorted_keys = REQUEST['sorted_keys'].split(',')

 But as far as I remember, a form keps the order of items in it, per the
 spec. So you could probably do:

  tal:block tal:repeat=key sorted_keys
  input type=hidden name=sorted_keys:list
 tal:attributes=key
  /tal:block

 Which you can get like (PythonScript):

  sorted_keys = REQUEST['sorted_keys']

 And I am pretty shure that they are in order. But I could be wrong, so
 the first approach is probably the safest.

 Btw. These questions should really be asked on the Zope list, not
 zope-dev. zope-dev is for subjects regarding the development of zope,
 while the zope list is for development with Zope.


 regards Max M



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Re: [ZODB-Dev] Re: BTrees strangeness (was [Zope-dev] Zope 2.X BIG Session problems - blocker - our site dies - need help of experience Zope developer, please)

2004-03-10 Thread Chris McDonough
On Wed, 2004-03-10 at 23:14, michael wrote:

Thanks for your excellent isolation here.

 I don't get a KeyError thrown until *after* at least one rendering of  
 standard_error_message that includes an access to a session variable.  
 And I'm only getting KeyError's for sessions that have had a chance to  
 expire. And that KeyError will be thrown whenever any access is made  
 for the session. (Previously I thought I was *only* seeing KeyError's  
 being thrown from standard_error_message.)

I think after provide transaction isolation for the duration of an
error, we will not see this symptom occur again.  That's the first step,
at least.  We are going to have a bugathon at the Zope 2 sprint at
PyCon 9 days from now, and I will put this high on the list.  Would you
be willing to test a Zope 2.7 version that contains a fix?

Thanks!

- C


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Re: [ZODB-Dev] Re: BTrees strangeness (was [Zope-dev] Zope 2.X BIG Session problems - blocker - our site dies - need help of experience Zope developer, please)

2004-03-10 Thread michael
On 11/03/2004, at 7:25 PM, Chris McDonough wrote:

On Wed, 2004-03-10 at 23:14, michael wrote:

Thanks for your excellent isolation here.

I don't get a KeyError thrown until *after* at least one rendering of
standard_error_message that includes an access to a session variable.
And I'm only getting KeyError's for sessions that have had a chance to
expire. And that KeyError will be thrown whenever any access is made
for the session. (Previously I thought I was *only* seeing KeyError's
being thrown from standard_error_message.)
I think after provide transaction isolation for the duration of an
error, we will not see this symptom occur again.  That's the first 
step,
at least.  We are going to have a bugathon at the Zope 2 sprint at
PyCon 9 days from now, and I will put this high on the list.  Would you
be willing to test a Zope 2.7 version that contains a fix?
Sure.

Michael

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Re: [Zope-dev] Question about _v_ attributes and database connections

2004-03-10 Thread Marco Bizzarri
On Wed, Mar 10, 2004 at 02:56:33PM +, Chris Withers wrote:
 Marco Bizzarri wrote:
 
  What I would like to do is to have an hook to the removal of a _v_
  attribute, so that I can perform some action *BEFORE* losing any
  reference to the object itself. I look at the setattr code in
  cPersistence.c and tried also to write my own __setattr__,
 
 __setattr__ isn't the hook you're looking for..

 Correct, I discovered that after some digging.
 
 This is better done in a transcation-hooking type way, a la CTM.py in 
 ZOracleDA...
 
 cheers,
 
 Chris

 I'm trying something inspired to that at the moment... I succeeded in
 installing an hack, very inspired from your code (but at a much simpler
 level) and some code in the SecurityManager, where I mantain a dictionary
 of connections, indexed by the result of thread.get_ident(). Once a
 thread needs a new connection, either it is present in the dictionary
 or not. If it is present, give it to the thread and assign that to the
 _v_database_connection attribute. Otherwise, create a new one, put in
 the dictionary, and go on as before.

 Of course this is a (horrible) hack, because if you have more than one
 ZPsycopg objects you will end with mixed connections (argh!)

 As a proof of concept however it works, and it is resistent to the
 refreshing of other products (not the ZPsycopg one).

 Regards
 Marco

 -- 
 Simplistix - Content Management, Zope  Python Consulting
- http://www.simplistix.co.uk

-- 
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